What is the easiest and cheapest way to get audio from my computer to three receivers? I have to get a new sound card so that I can have access to RCA outputs to begin with. Are there sound cards with multiple simultaneous outputs. Or is it best to just get a cheap sound card with an RCA output and get a cheap RCA splitter box. I don't need to have audio to all three receivers at the same time, so a switch would be okay.

- Nick